2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/08/2017 | 11:30 AM - 11:45 AM | Forest Resiliency - What Is At Risk In Terms Of Forest Water Supplies In The Anthropocene? | 302B
Forest Resiliency - What Is At Risk In Terms Of Forest Water Supplies In The Anthropocene?
Forests serve crucial roles in regulating freshwater resources. When complex global change drivers interact with the equally complex structure of natural forest ecosystems, uncertainty is created as forests change in structure and function. Within a climate-modified forest stream, not all measurable ecological processes change in lockstep – some signals change quickly and may intiate a cascading sequence of changes. These changes are expected to occur at a higher rate in northern latitude forests. The following question was considered: Is there empirical evidence of climate change driving forest waters into a “new normal”? First, multivariate autoregressive models were applied to a cluster of forested watersheds to explore the interactive effects of climate change on hydrological and biogeochemical resiliency (reactivity and recovery rates). Second, indicators of shifts to alternative stable states were explored to identify which hydrological and biogeochemical constituents were driving loss of resiliency. Forests without wetlands showed higher reactivity but lower recovery rates in hydrological and biogeochemical exports. Forests without wetlands appear to be moving into a “new normal” defined by increased nitrogen (but decreased phosphorus) export to surface waters, with human-modified forested systems (e.g., managed forests) accelerating these changes.
- C20 Climate Change
- C10 Biogeochemistry
- S24 Towards a predictive freshwater ecology: using time-series data to understand and forecast responses to a changing environment
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Presenters/Authors
Irena Creed
(), School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, irena.creed@usask.ca;
Irena Frances Creed is a Professor and Canada Research Chair in Watershed Sciences at Western University in Canada. Her research leadership and activity have improved our understanding of watershed hydrological and biogeochemical functions under present and predicted climate scenarios. By coupling this understanding with innovative techniques in geographic information systems, remote sensing and modeling to characterize these functions, she has enabled governments to develop planning and regulatory tools in support of innovative policies designed to ensure the sustainability of watershed systems.
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Mark Scheuerell
(), University of Washington , scheuerl@uw.edu;
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